Image Inspection Method Using Multiple Cameras

Abstract

The invention relates to a digital image inspection method. A plurality of image capturing devices respectively photograph digital sub-images of a printed image to be inspected, and the digital sub-images are combined into a digital overall image in an image processing computer, and the overlapping areas of the sub-images generate butt joint edges. Edge, the image processing computer checks the digital overall image and sends the result to the control computer of the machine processing the printing material. The image processing computer creates a new image with the help of the edge detection method: only the detected edges are included. The image processing computer uses the image capture device Create another new image with the known position of the docking edge: only include the area with the docking edge of the image capture device, and the image processing computer will overlap the two newly created images to generate a composite image: only include the edge along the image capture device docking edge The image processing computer applies the composite image to the digital ensemble image to define occluded areas in the composite digital ensemble image that are not detected by the image inspection.

Description

technical field

[0001] The invention relates to a digital image inspection method using multiple cameras.

[0002] The invention is in the technical field of automated quality control of printed products. Background technique

[0003] In the printing industry, the automatic quality control of the printed products produced has been known for a long time. For this purpose, the produced printed product is usually image-wise detected using a camera system consisting of one or more digital cameras. In this case, the digital camera can be installed both inside the printing press (advantageously after the last printing unit) or outside the printing press on the stacker.

[0004] In this case, a system with an internally installed digital camera is in most cases an integral part of the printing press itself, whereas an image inspection system with an externally installed digital camera is mostly external and Systems that work independently, however, these external and independent...

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